頁岩コンデンセートガス層埋蔵量計算の多因子連成物質収支法

  • role: First author第一作者
  • Affiliation:

    College of Petroleum Engineering, Xi’an Shiyou University, Xi’an, Shaanxi 710065, China

    Key Laboratory of Exploration and Development of Complex and Difficult-to-Produce Oil & Gas Reservoirs (Xi’an Shiyou University), Ministry of Education, Xi’an, Shaanxi 710065, China

    Coalbed Methane Research Center, China University of Petroleum (Beijing), Beijing 102249, China

  • Email:shijuntai_1984@163.com
  • Introduction:石军太(1984—),男,教授、博士研究生导师,复杂气藏和非常规气藏渗流机理、产能预测与开发技术。E-mail: shijuntai_1984@163.com。
SHI Juntai123,  
  • Affiliation:

    Coalbed Methane Research Center, China University of Petroleum (Beijing), Beijing 102249, China

ZHANG Shuo3,  
  • Affiliation:

    College of Petroleum Engineering, Xi’an Shiyou University, Xi’an, Shaanxi 710065, China

    Key Laboratory of Exploration and Development of Complex and Difficult-to-Produce Oil & Gas Reservoirs (Xi’an Shiyou University), Ministry of Education, Xi’an, Shaanxi 710065, China

HUANG Hai12,  
  • Affiliation:

    College of Energy (College of Modern Shale Gas Industry), Chengdu University of Technology, Chengdu, Sichuan 610059, China

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China

XU Fengyin45,  
  • role: Corresponding author通信作者
  • Affiliation:

    Henan International Joint Laboratory for Unconventional Energy Geology and Development, Jiaozuo, Henan 454003, China

  • Email:yxcao17@126.com
  • Introduction:曹运兴(1955—),男,教授、博士研究生导师,非常规天然气开发技术。E-mail:yxcao17@126.com。
CAO Yunxing6*,  
  • Affiliation:

    China United Coalbed Methane National Engineering Research Center Co., Ltd., Beijing 100095, China

HUANG Hongxing7,  
  • Affiliation:

    PetroChina Coalbed Methane Company Limited, Beijing 100028, China

WANG Hongya8,  
  • Affiliation:

    College of Petroleum Engineering, Xi’an Shiyou University, Xi’an, Shaanxi 710065, China

    Key Laboratory of Exploration and Development of Complex and Difficult-to-Produce Oil & Gas Reservoirs (Xi’an Shiyou University), Ministry of Education, Xi’an, Shaanxi 710065, China

REN Long12,  
  • Affiliation:

    College of Petroleum Engineering, Xi’an Shiyou University, Xi’an, Shaanxi 710065, China

    Key Laboratory of Exploration and Development of Complex and Difficult-to-Produce Oil & Gas Reservoirs (Xi’an Shiyou University), Ministry of Education, Xi’an, Shaanxi 710065, China

LAN Jiayi12,  
  • Affiliation:

    College of Petroleum Engineering, Xi’an Shiyou University, Xi’an, Shaanxi 710065, China

    Key Laboratory of Exploration and Development of Complex and Difficult-to-Produce Oil & Gas Reservoirs (Xi’an Shiyou University), Ministry of Education, Xi’an, Shaanxi 710065, China

KAN Baoxi12,  
  • Affiliation:

    Coalbed Methane Research Center, China University of Petroleum (Beijing), Beijing 102249, China

JI Yitianyu3,  
  • Affiliation:

    Coalbed Methane Research Center, China University of Petroleum (Beijing), Beijing 102249, China

WANG Xiaoyang3,  
  • Affiliation:

    Coalbed Methane Research Center, China University of Petroleum (Beijing), Beijing 102249, China

LUO Benliang3

サマリー

頁岩コンデンセートガス層の埋蔵量評価は、ガスの吸着-脱着やコンデンセートオイルの析出など複雑な物理機構の影響を受け、その作用機構や影響度はまだ明確ではない。流体のモル保存と貯留層体積の動的変化に基づき、吸着-脱着、コンデンセートオイルの析出、孔隙圧縮、結合水膨張、基質収縮、水蒸気膨張の多重効果を考慮した物質収支方程式を構築した。線形化導出により、新たな埋蔵量計算法を提案し、現場事例試算及び数値シミュレーションによる信頼性検証を行い、従来法との比較を通じて埋蔵量評価に影響する主要因子とその感度を体系的に分析した。研究結果は以下の通りである。①提案した埋蔵量計算法は、貯留層および流体の物性パラメータ、複数の平均地層圧及び累積生産データを用い、線形関数の傾きと切片から自由態及び吸着態コンデンセートガスの原始地質埋蔵量を計算し、天然ガス及びコンデンセートオイルの原始地質埋蔵量を求めることが可能である。②新手法の埋蔵量結果と数値シミュレーションの基準値との相対誤差は1%未満であり、高い精度と信頼性を示す。部分的要因を無視した場合、既存の従来法に退化可能であり、包括性と互換性を兼ね備える。③吸着効果を無視すると埋蔵量が実際値より40.71%低くなる一方、コンデンセートオイルの析出及び孔隙圧縮を無視すると埋蔵量が17.71%高くなり、結合水膨張、基質収縮、水蒸気膨張は埋蔵量評価結果への影響は極めて小さい。研究結果は頁岩コンデンセートガス層の開発規模決定、井間距離の最適化、動的解析及び回収率予測の理論的根拠を提供する。

キーワード

吸着-脱着;逆コンデンセート作用;物質収支方程式;原始地質埋蔵量;埋蔵量計算;コンデンセートガス層;頁岩

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